Microprocessor: ESP32-S3FN8 (32-bit LX7 dual core processor, five stage pipeline rack Structure, main frequency up to 240MHz). SX1262 LoRa node chip. Type-C USB interface with a complete voltage regulator, ESD protection, short circuit protection, shielding, and other protection Onboard SH1.25-2 battery interface, integrated lithium battery management system (charge and discharge management, overcharge protection, battery power detection, USB / battery power automatic switching). Integrated WiFi, LoRa, Bluetooth three network connections, onboard Wi-Fi, Bluetooth dedicated 2.4GHz metal spring antenna, reserved (U.FL) interface for LoRa Integrated CP2102 USB to serial port chip, convenient for program downloading,debugging information printing. With good circuit design and low-power. Colour:black+white Material:PCB+electronic components Size:5.8 x 2.2cm Package Contents: 2 x Development board 4 x Pin 2 x cable 4 x 868-915Hz antenna Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.